| 摘要 |
PROBLEM TO BE SOLVED: To obtain an input and output plug with a switch capable of adapting itself to even audio input and output connectors (jacks) different in kinds of cellphones or the like. SOLUTION: A screw is formed at an electrode connecting part for an operation signal 4a of a 4-pole plug 10, and just one kind of plug is used for equipment with both 3-pole and 4-pole jacks, by screwing in an adaptor 4 to be an electrode for operation signals for use with the 4-pole-jack one and taking it off for use with a 3-pole-jack one. COPYRIGHT: (C)2005,JPO&NCIPI
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